- #1
Feodalherren
- 605
- 6
Homework Statement
f(t)=tcos(4t)
Homework Equations
tnf(t)=(-1)n dF(s)/dsn
The Attempt at a Solution
I don't understand why this formula is giving me the oppiste sign of the answer.
If I apply the formula I get
(16-s2)/(s2+16)2
Because n=1 I need to multiply by a negative but this yields the incorrect answer.